Adverb
In a foul manner; filthily; nastily; shamefully; unfairly; dishonorably.
Source: Webster's dictionaryAt risk of sounding foully pompous I think that writers' groups are probably very useful at the beginning of a writing career. Bernard Cornwell
two policemen were foully murdered Source: Internet
this internationally known writer was foully condemned by the Muslim fundamentalists Source: Internet
He is unsure whether Macbeth committed regicide to gain the throne, but muses in a soliloquy that "I fear / Thou play'dst most foully for 't". Source: Internet
No wonder if among an adulterous and incestuous people, in which both births and marriages are illegitimate, a nation out of the pale of the laws, nature herself should be foully corrupted by perverse habits. Source: Internet